What's the best mattress in a box 2025? Nine top picks from a sleep expert

The Siena Memory Foam Mattress in a box on the floor in front of a bed frame, ready to be unboxed
(Image credit: Future)

Mattresses in a box changed the sleep industry. The convenient packing and delivery process allows shoppers to pick a new bed from the comfort of their home, without having to haul a bulky mattress round the staircase. Nowadays, mattresses in a box encompass everything from luxury hybrids to organic latex to cheap memory foams, providing a blend of value for money and comfort that has landed many boxed beds in our best mattress of 2025 guide.

We’ve spent thousands of hours testing all the latest mattresses in a box, and we can confirm that these beds rival traditional mattresses for support, comfort, and versatility. Our number one pick is the DreamCloud Hybrid mattress. This luxury feeling bed offers head-to-toe support at an affordable price, with all the convenience we expect from a mattress in a box.

Another advantage of boxed mattresses? They tend to be cheaper than their traditional counterparts, and with the Presidents’ Day mattress sales on the horizon, we’re expecting some exciting discounts. Read on to find our top pick mattresses in a box, all tested and approved by sleep experts.

1. The best mattress in a box overall

This year's best mattress in a box for nearly all sleepers, delivering hotel-level comfort for less than its rivals

Specifications

Type: Hybrid
Materials: Memory foam, polyfoam, coils
Firmness (1-10): 6.5 (we rate it as an 8 out of 10)
Height: 12"
Sleep trial: 365 nights
Warranty: Lifetime
Price bracket: Mid-range

Reasons to buy

+
Luxury bed for an affordable price
+
Supportive but pressure relieving 
+
Breathable and sleeps cool

Reasons to avoid

-
Could be too firm for lighter sleepers

Quick summary

The DreamCloud is more than just the best mattress-in-a-box overall – we also rank it as one of this year's best hybrid mattresses too. It offers excellent hip and back support which should provide relief for those with back pain. Most body types and sleep positions will feel supported on this affordable hybrid, although some side sleepers (and especially those under 130lbs) might find it a bit too firm, even after an initial break-in period. If that's you, consider spending a little more for the Helix Midnight Luxe (#4), or go with the affordable all-foam Nectar Classic (#2).

One of our favorite things about the DreamCloud is the value for money it offers. An evergreen DreamCloud sales places it in the lower mid-range price bracket and the benefits are premium: a 365-night trial and lifetime warranty. Only the Nectar Classic in this guide offers comparable extras (although the Bear Hybrid Elite at #7 has a lifetime warranty.)

Expert verdict
A photo of sleep staff writer Ruth jones
Expert verdict
Ruth Jones

The DreamCloud Mattress delivers an excellent performance from a lower price bracket. It's supportive for back and stomach sleepers, with the cushioned surface offering relief from aches and pains. Side sleepers can also get comfortable on the DreamCloud, although it might take a few weeks to break in — but you have 365 nights to test the bed at home, so that's ample time to adjust.

Read more: DreamCloud Mattress review

2. The best memory foam mattress in a box

The best mattress in a box for sleepers who crave the hug of memory foam at a lower price than a Tempur-Pedic

Specifications

Type: All-foam
Materials: Memory foam, other foams
Firmness (1-10): 6.5 (we rate it between 6.5-7)
Height: 12"
Trial: 365 nights
Warranty: Lifetime
Price bracket: Lower-mid range

Reasons to buy

+
Outstanding value for money
+
Balanced for side and back sleeping
+
Long trial and warranty

Reasons to avoid

-
Takes a while to expand
-
Larger sleepers may find it too soft

Quick summary

Nectar is a popular mattress in a box brand and its flagship Nectar Classic Memory Foam is an excellent value bed in a box. The balanced foam feel is ideal for side and back sleepers, but stomach sleepers should consider a firmer mattress such as the Siena (#3). Our testers rated it highly for motion isolation and were impressed by the top cover's moisture-wicking properties.

The Nectar is a medium-firm mattress that leans towards firm, but we found it delivered an excellent balance of softness and support. You ease into the upper foam layer which comfortably cushions the joints, but the dense foams beneath prevent you from sinking too far. While not as marshmallow-y as the Leesa Sapira (#9), this is a good middle ground for most sleepers.

Expert verdict
A photo of sleep staff writer Ruth jones
Expert verdict
Ruth Jones

It might be firmer than our testing team were expecting, but the Nectar Classic still has contoured pressure relief that will cradle side sleepers and prevent the dreaded numb arm. I'd also recommend the Nectar Classic for back sleepers, although stomach sleepers should look for a mattress with more support at the hips.

Read more: Nectar Classic Memory Foam Mattress review

3. The best cheap mattress in a box

A great value memory foam mattress in a box that outperforms its smaller price tag

Specifications

Type: Memory foam
Materials: Gel memory foam, foam
Firmnes: 6.5 (we rate it as a 9)
Depth: 10”
Trial: 180 nights
Warranty: 10 years
Price bracket: Budget

Reasons to buy

+
Remarkable support
+
Sleeps cooler than expected
+
Includes a 180-night trial

Reasons to avoid

-
Firmer than expected
-
One of the shorter beds on our list

Quick summary

The Siena Mattress is the cheapest bed-in-a-box on our list, but performance-wise it holds its own among its higher-priced rivals – including its older sibling, the Nectar, which sits directly above it on this list.

Back and stomach sleepers will enjoy its outstanding support and subtle contouring, while couples and families will appreciate the low level of motion transfer. Side sleepers should look for something softer (like the Nectar), but with decent temperature regulation and strong edge support, the Siena is an impressive all-rounder. At this price, we strongly recommend it for a guest bed or a college dorm.

Expert verdict
A photo of sleep staff writer Ruth jones
Expert verdict
Ruth Jones

I wasn't expecting much from the Siena Memory Foam Mattress — at less than $400 for a queen, it's a real budget buy. But the Siena bed in a box impressed me with its full-body support and light cushioning. As a stomach sleeper, I'd happily drift off on it. Cheaper all-foam beds tend to have a lot of sag, something the Siena avoids thanks to its firm feel. On the flipside, there's just not enough pressure relief for side sleepers.

Read more: Siena Memory Foam Mattress review

4. The best mattress in a box for side sleepers

Our top-rated luxury boxed mattress for super-comfy side sleeping – it suits back sleepers, too

Specifications

Type: Hybrid
Materials: Memory foam, coils, other foams
Firmness (1-10): 6
Height: 13.5"
Trial: 100 nights
Warranty: 10 years
Price bracket: Premium

Reasons to buy

+
Excellent pressure relief
+
Fantastic motion isolation
+
Comfy for back sleeping too

Reasons to avoid

-
Lacks side carry handles

Quick summary

The Helix Midnight Luxe is our favorite mattress for side sleepers with a plush pillow-top and enhanced lumbar support – elements that translate to a comfy sleep experience for back sleepers, too. As the middle child in the 3-model Helix Midnight lineup, it possesses the best mix of performance, luxury and overall value (but if you're on a tighter budget, the Helix Midnight Core is equally supportive, if not as luxuriously plush.)

As a hybrid, it doesn't provide the profound sink-in sensation of a full-foam bed. if that's what you're after, consider the Nectar at #2. But the Midnight Luxe has upper memory foam layers to offer gentle contouring along the shoulders, hips and knees – key pressure points that affect side sleepers most. The Midnight Luxe also stands out for its minimal motion transfer, making it a good choice for couples and families.

Expert verdict
A photo of sleep staff writer Ruth jones
Expert verdict
Ruth Jones

I've listened to multiple side sleeping team members rave about the Helix Midnight Luxe Mattress, praising the luxuriously plushness and balanced feel. With cooling and supportive upgrades available, this mattress can suit a lot of sleepers. But not if you lie o your stomach — try the Helix Dusk Luxe instead.

Read more: Helix Midnight Luxe Mattress review

5. The best firm mattress in a box

The firmest, flattest mattress in a box on the market

Specifications

Type: All foam
Materials: Foam
Firmness (1-10): 8 (Firm), 9 (Extra Firm)
Height: 10"
Trial: 120 nights
Warranty: 10-year
Price bracket: Mid-range

Reasons to buy

+
Double-sided design
+
Full-body support
+
Super-firm edges

Reasons to avoid

-
Not good for side sleepers
-
Can sleep warm

Quick summary

If you're looking for the best firm mattress, then they don't come much firmer than this. The Plank Firm Mattress is a double-sided all-foam design (one side is Firm, the other Extra-Firm.) We rated it an eight and nine out of 10, respectively, on the firmness scale, with a lack of sink that means you really lie on top of this mattress.

The upside of this incredibly firm feel is that the Plank offers exceptional support, from head to toe, edge to edge and corner to corner. For stomach sleepers, this ensures the hips are held comfortably aligned with the spine, while back sleepers who prefer a firmer feel will appreciate how it lifts the lower back (for back sleepers who prefer some cushioning, try the Siena at #2.) The lack of sink does mean pressure relief is minimal, with no cushioning for side sleepers.

Expert verdict
A photo of sleep staff writer Ruth jones
Expert verdict
Ruth Jones

When I first tried the Plank Firm, I though the mattress was way too hard for me to ever drift off comfortably. But once I was used to the incredible firmness, I could appreciate the subtle cushioning and not-so-subtle support. Stomach sleepers and back sleepers will appreciate how the mattress lifts the lower back, while the edge support is outstanding. However, there's almost no cushioning, which spells aches and pains for side sleepers.

Read more: Plank Firm Mattress review

6. The best mattress in a box for pressure relief

A unique hybrid of gel and foam that delivers exceptional relief and targeted support

Specifications

Type: GelFlex hybrid
Material: Premium foam, GelFlex Grid
Firmness (1-10): 6-7.5
Height: 11"
Trial: 100 nights
Warranty: 10 years
Price bracket : Premium

Reasons to buy

+
Plush yet firm (and in all the right places)
+
GelFlex Grid helps with airflow
+
Low motion transfer

Reasons to avoid

-
Edges could be sturdier
-
Heavy to set up

Quick summary

Purple is a pioneer in the online mattress space, and the Purple Plus is our favorite mattress for sleepers seeking relief from sore joints. Thanks to a combo of the brand's famous GelFlex Grid and multiple foam layers, the Purple Plus is somehow soft and firm in all of the right places.

The Purple's adaptable grid ensures cushioned joint relief and proper support for your spine, no matter how you lay. And thanks to the GelFlex Grid, you're likely to sleep cooler than you would on a comparable all-foam bed. But you may need to adjust to its squishy feel — for a classic foam feel, try the Nectar at #2.

Expert verdict
A photo of sleep staff writer Ruth jones
Expert verdict
Ruth Jones

There's nothing else quite like the Purple Plus in this guide, with a unique feel courtesy of the GelFlex Grid. This geometric comfort layer bends to the body to create a floating pressure relief that eases joint pain. You really can feel the grid, however, which isn't an aspect everyone enjoys.

Read more: Purple Plus Mattress review

7. The best cooling mattress in a box

A luxury cooling mattress for people with lower back pain

Specifications

Type: Hybrid
Material: Copper-infused memory foam, foam, coils, phase-change materials (cover), Celliant fibers (upgraded cover)
Firmness (1-10): 5, 6 or 7
Height: 14"
Trial: 120 nights
Warranty: Lifetime
Price bracket: Upper-mid range to premium

Reasons to buy

+
Promises (and delivers) cooler sleep
+
Strong support for back pain
+
Excellent motion isolation

Reasons to avoid

-
Poor edge support along the foot of the bed
-
Extra cost for full cooling power

Quick summary

The Bear Elite Hybrid combines outstanding temperature regulation with excellent pressure relief and lumbar support making it a great mattress for hot sleepers and back pain sufferers. It impressed us enough to place first in our overall ranking of the best cooling mattresses.

The brand's thoughtful use of Celliant fibers in the optional cover offer the exceptional cooling power along with recovery technology to promote overall wellbeing. There are three firmness options to suit every sleep style and bed-sharers will appreciate the low level of motion transfer. It's pricey, however, with the Cocoon by Sealy Chill below a cooling option for tighter budgets (even if it lacks the chilled feel of the Bear.)

Expert verdict
A photo of sleep staff writer Ruth jones
Expert verdict
Ruth Jones

The Celliant-infused cover transforms the Bear Elite Hybrid from a good cooling mattress to one of the best cooling mattresses around. The clever fiber absorbs heat and reflects it back as infrared energy, for a cooler (and more scientific) sleep feel. Don't think it's all about the cooling, however. Beneath that cover is a supportive mattress with great motion isolation and three firmnesses to suit different sleep needs.

Read more: Bear Elite Hybrid Mattress review

8. The best budget cooling mattress in a box

The best mattress in a box for hot sleepers on a tight budget

Specifications

Type: All-foam
Materials: Memory foam, other foams, phase change material
Firmness (1-10): 6 (we rate it a 6.5)
Height: 10"
Trial: 100 nights
Warranty: 10 years
Price bracket: Lower-mid / mid-range

Reasons to buy

+
Cool for an all-foam bed
+
Competitively priced
+
Low motion transfer

Reasons to avoid

-
Not as cool as the Bear Elite
-
Won't 'hug' like other foam beds

Quick summary

The Cocoon Chill Memory Foam is another bed-in-a-box that features in our best cooling mattress guide. Made by industry giant Sealy, it has a special, stretch-knit cover that's infused with advanced phase-change material to keep sleepers comfortable — but minus the heavy price tag of its cooling rivals.

As a cheaper all-foam mattress, we weren't expecting much from the Cocoon by Sealy Chill, but it exceeded our low bar and then some. It can't compete with the exceptional cooling of the Bear Elite Hybrid Mattress above, but on the other hand, it's about $1,000 cheaper. Beyond cooling, the medium-firm feel is suitable for most sleep positions, and while there's not much body contouring, the pressure relief is exceptional.

Expert verdict
A photo of sleep staff writer Ruth jones
Expert verdict
Ruth Jones

I used to think budget-friendly all-foam cooling mattress was an oxymoron, but the Cocoon by Sealy Chill proves you can enjoy cooler sleep for less. There might not be much body contouring, but our testers were still impressed by the pressure relief. For increased support and an even cooler feel, however, I recommend upgrading to the hybrid model.

Read more: Cocoon by Sealy Chill Memory Foam mattress review

9. Best mattress in a box for couples

Our top bed-in-a-box pick for couples who want a bouncy bed that won't disturb their sleep

Specifications

Type: Hybrid
Materials: Memory foam, coils, other foams
Firmness (1-10): 6-8 (we rate it a 6.5)
Depth: 11"
Trial: 100 nights
Warranty: 10 years
Price bracket : Premium

Reasons to buy

+
Terrific motion isolation
+
Has a nice bounce to it
+
Good for back/side sleepers

Reasons to avoid

-
Middling edge support
-
Cooling tech is ineffective

Quick summary

The Leesa Sapira Hybrid is the brand's best-selling mattress and it impressed our testing team with its five-star motion isolation. Hybrid mattresses tend to be bouncier than their all-foam counterparts, but the Leesa Sapira dampens movement exceptionally well. We recommend it to light sleepers who share a bed with a fidgety partner and want to avoid frequent wake ups.

We're also fans of the high-quality foam layers, which no doubt play a role in the Sapira's excellent motion isolation (and high price.) We found it nestles the body without providing too much sink, with a fast response that keeps you cradled even if you move around. It doesn't offer the value for money of something like the DreamCloud or Nectar that top this guide, but it is GREENGUARD Gold certified.

Expert verdict
A photo of sleep staff writer Ruth jones
Expert verdict
Ruth Jones

If you share a bed with a fidgeter, you'll know their restless dreams often become your disturbed nights. Our testers found the Leesa Sapira simply eats up movement, meaning light sleepers can share with their partners / kids / pets and still get decent shut-eye. It's not the best value for money mattress in this guide, but the materials are high-quality and the sleep feel is plush.

Read more: Leesa Sapira Hybrid Mattress review

How we test mattresses in a box

The Tom's Guide mattress review process is editorially independent and not influenced by any third parties. We conduct market research to see which new boxed mattresses are being released, then contact the brands for review samples. Every mattress in this guide has been selected by our editorial team.

Our expert mattress testers sleep on each mattress for at least three weeks, which is roughly how long it takes for your body to get used to a new mattress. However, firmness and comfort are subjective so we also ask a trusted and experienced testing panel.

Our mattress in a box testing panel is made up of people with different sleep needs and body types. This ensures we get a well-rounded view of how a mattress feels and performs for different body types and sleeping positions.

Helix Midnight Luxe Mattress

(Image credit: Future)

We don't just sleep on these mattresses – we also run a series of tests for an objective look at their motion isolation, pressure relief, and edge support. After analyzing our test data and conducting extensive user review research, we rate each mattress on a 5-point scale.

All of this in-house testing data, plus our user review research, is then used to create a final review score for the mattress in a box. If it's high enough, the bed will be added to this guide of the year's best beds-in-a-box.

These processes enable us to produce accurate, well-balanced, and data-backed mattress reviews to help you easily decide whether the mattress you’re interested in really is the best choice for you. See our mattress methodology for more.

Mattress in a box test data

Below is a breakdown of how we scored each mattress-in-a-box. You can refer to this if you're looking for beds that excel in a specific area. We also included the average customer review scores for each mattress (as of November 2024).

Swipe to scroll horizontally
Header Cell - Column 0 The DreamCloudNectar ClassicSiena MattressHelix Midnight LuxePlank FIrmPurple PlusGhostbed LuxeCocoon ChillLeesa Sapira Ghostbed LuxeHelix Dusk LuxeAurora Luxe
Overall test score4.5/54.5/54.5/54.2/54.5/54.5/54/54/54.5/54/54.5/54.5/5
Set-up4/54/54.5/54/54/54.5/55/54/53/55/54/54/5
Off-gassing4.5/54/55/54/54.5/55/52/55/53/52/54.5/52.5/5
Temperature regulation4.7/54.5/54.5/53.5/54/55/55/54/53.5/55/53.5/54/5
Motion Isolation4.5/54.5/54.5/54.5/54.5/54.5/55/54/55/55/54/52/5
Edge support3.5/53.5/55/55/55/53.5/55/53/53.5/55/54/54/5
Average user review score4.6/54.7/54.4/54.4/54.8/54.5/54.8/54.7/54.4/54.8/54.4/54.7/5
Row 7 - Cell 0 Row 7 - Cell 1 Row 7 - Cell 2 Row 7 - Cell 3 Row 7 - Cell 4 Row 7 - Cell 5 Row 7 - Cell 6 Row 7 - Cell 7 Row 7 - Cell 8 Row 7 - Cell 9 Row 7 - Cell 10 Row 7 - Cell 11 Row 7 - Cell 12

Also tested and recommended

We test multiple mattresses-in-a-box every month. This guide highlights the best of the bunch, but perhaps there's an option that didn't make the cut that might be just what you're looking for. You can also take a look at our other specialist guides if you know you want something cooling, firm, or suitable for back pain.

Some of the other mattresses-in-a-box that we've reviewed include:

1. DreamCloud Premier Hybrid mattress: from $649 at DreamCloud Sleep

1. DreamCloud Premier Hybrid mattress: from $649 at DreamCloud Sleep
The DreamCloud Premier Hybrid offers hotel-quality comfort on a budget. Our mattress tester was seriously impressed with its cloud-like comfort, solid support and effective cooling, making it a great all-rounder. It also comes with the fantastic benefits that DreamCloud offers with all its mattresses including 365-night trial, forever warranty and free returns. We did notice some motion transfer in our DreamCloud Premier Hybrid mattress review, so maybe think twice about this one if you sleep with a restless partner. For everyone else, though, the DreamCloud Premier Hybrid is a great value option.

2. Helix Midnight mattress:was from $936.25now from $749 at Helix Sleep

2. Helix Midnight mattress: was from $936.25 now from $749 at Helix Sleep
Side sleepers can enjoy a dreamily comfortable sleep with the Helix Midnight. This mid-range mattress offers cradling memory foam, that will leave you feeling cosy and secure night after night. In our Helix Midnight mattress review, we noted that it may be too soft for stomach sleepers, and its edge support may be lacking, but if you're looking for a soft and luxurious mattress under $1,000 you could do a lot worse than the Helix Midnight.

3. Nectar Premier Hybrid: from $799 at Nectar Sleep

3. Nectar Premier Hybrid: from $799 at Nectar Sleep
Nectar produces some of the most high-quality and affordable mattresses-in-a-box. The hybrid model scored highly in our Nectar Premier Hybrid review for its support, motion-isolation and spinal alignment properties. It does have a few drawbacks - the edge support could be better and front sleepers will likely find it too soft. It also stands tall at 13", making it too deep for regular sheets. Still, if these aren't a problem for you, you'll be able to get a comfy sleep with the Nectar Premier Hybrid.

4. Birch Natural mattress:was from $1,373.75now from $1,099

4. Birch Natural mattress: was from $1,373.75 now from $1,099
If you're looking for a mattress-in-a-box that's kind to the environment, the Birch Natural is the bed for you. It offers firm yet bouncy support, and accommodates a wide range of weights and sleep types. It's not ideal for co-sleepers, lacking in motion isolation and some may find its non-sinking foam too firm. Our Birch Natural mattress review praised its suitability for combi sleepers, as well as its cooling properties. It comes with a 100-night sleep trial, 25-year warranty, and free fast shipping.

5. Helix Dusk Luxe mattress: was from $1,373.75 now from $1,099

5. Helix Dusk Luxe mattress: was from $1,373.75 now from $1,099
The Helix Dusk Luxe strikes a great balance of relief and support for stomach sleepers who don't want a decidedly firm mattress. It's also balanced enough for back sleeping, but even if you're an occasional side sleeper, you'll likely want a mattress that provides more cushioning for your joints.

6. Brooklyn Bedding Aurora Luxe mattress: was from $1,199 now from $899.25

6. Brooklyn Bedding Aurora Luxe mattress: was from $1,199 now from $899.25
The Brooklyn Bedding Aurora Luxe delivers hotel-quality comfort at a fairly reasonable price. We like the versatility – multiple comfort levels, optional pillow-top, and non-traditional bed sizes – and we also think it does a good job of keeping night sweats at bay. On the other hand, we're hesitant to recommend it for most couples due to the lack of motion isolation.

7. WinkBed mattress: was from $1,149now from $849 at WinkBeds

7. WinkBed mattress: was from $1,149 now from $849 at WinkBeds
In our WinkBed mattress review, we found that the mattress offers superior targeted support, with a zoned coil layer that offers firmer pressure where needed and lighter support in others to allow for more contouring. WinkBeds never sell its mattress at full price and the $300 discount is an evergreen offer that we’ve never seen bettered, with a queen $1,499 from the MSRP of $1,799.

Mattress in a box FAQs

What is a mattress in a box?

A mattress in a box is a memory foam or hybrid mattress that has been machine-compressed into a smaller size, tightly rolled, then packed into a sturdy cardboard box for shipping to your home. Shipping times vary by brand, but you can get a boxed mattress as fast as within two working days.

Once that box arrives at your door, your job is to unbox it. Each mattress in a box is covered in a reinforced plastic cover, and many brands give you a tool to slice through that covering more easily. Once the mattress has been fully unpacked, pop it on your bed base where it will begin to regain its full shape.

While they are the same as regular mattresses once fully decompressed, a mattress in a box takes anywhere from a few hours to a few days to be ready to sleep on. Emma mattresses, for example, are ready to sleep on in a few hours, while Nectar mattresses take up to 72 hours.

You may notice a bit of a smell at first, but this mattress off-gassing is normal. Just open the windows and it should soon pass, leaving you to enjoy your comfy new bed. To care for your new mattress in a box, cover it with one of the best mattress protectors to safeguard against stains.

Casper has been credited with making beds-in-a-box popular since its launch nearly 10 years ago, and now we also have the likes of Purple, Layla, Nectar, Helix and many others.

In terms of warranty, coverage ranges from 10 years to a forever warranty (Nectar and DreamCloud), but we’d advise you to check the small print so that you know what will and won’t be covered. For further guidance, read our feature on how do mattress warranties work.

Are mattresses in a box any good?

Yes, boxed mattresses can be excellent if you pick the right one. We've spoken to experts from the mattress industry to get a definitive answer on if beds that come in a box are good, and the short answer is that the quality of the mattress is much more to do with the specific model than whether it has been compressed or not. There are plenty of fantastic boxed options – such as those included in our ranking – but also plenty of rubbish cheap boxed mattresses that should be avoided.

Boxed mattresses are often delivered quicker and are easier to maneuver, but you'll avoid decompression time and perhaps also off-gassing if you go for a traditional option.

It’s easy to look at the cheaper price tags of some mattresses in a box and dismiss them as being too cheap to be supportive or comfortable, but that simply isn’t the case. My team has spent hundreds of hours sleeping on some of the top boxed mattresses and find them equally as comfortable as traditional mattresses sold in-store.

Do you need a box spring for a mattress in a box?

Many years ago, a box spring was a must for your mattress. These days, it's not a necessity and in a lot of cases, using a box spring with your boxed mattress can void its warranty.

Read more: What is a box spring?

The reason? Modern mattresses are built to be sturdy enough that you can forego a bed base and simply put them on the floor (though we don't totally recommend this). Box springs made sense when thinner innerspring mattresses were the standard, as they provided a boost in support, height, and airflow. Today's memory foam, latex, and hybrid mattresses in a box should be fine with a foundation instead.

Mattress in a box expert buying advice

How to choose the best mattress in a box

With more and more options available for buying a mattress in a box, it’s now easier than ever to find something that suits your sleeping position, body weight and any particular needs you might have when it comes to getting a restful night’s sleep.

Things to look out for when buying a bed-in-a-box online include:

Features – If you need extra features from a mattress to help you sleep, then there’ll be something for you, whether you sleep hot, need more pressure relief, or extra support for backache. Plenty of mattresses now come with innovative tech and eco-friendly materials too, so whatever your concerns, it should be covered.

Firmness – just like standard mattresses, beds in a box come in a variety of firmnesses. If you know you will likely need a firmer mattress for instance, check before you buy to ensure you are getting the most comfortable choice for you.

A couple sleeps on the Siena Memory Foam Mattress in an orange bedroom

(Image credit: Siena Sleep)

Trial period and free delivery/returns – many top brands offer mattress trials on their mattresses, giving you the chance to try the mattress out for yourself. It’s always a good idea to take advantage of trial periods, and if you decide the mattress isn’t for you, check that you can get a full refund.

This takes a lot of the stress out of buying a mattress online, especially if the mattress is expensive. Also check if the company offers free returns so there’ll be no surprises if you do need to send the mattress back.

Reviews – online reviews often give you extra information about the mattress, including feedback after a few weeks’ use and a closer assessment of the feel and comfort for different body weights. If you have decided on a boxed mattress, compare a few user reviews on the brand websites with those elsewhere too.

When is the best time to buy a mattress in a box?

There are definitely key periods throughout the year when it’s better to buy a boxed mattress, and chief among these is the Black Friday mattress deals, where prices are at their lowest and discounts are at their highest.

These often roll over into Cyber Monday mattress deals, which is the first Monday immediately following Black Friday, and you may even see some higher discounts on Cyber Monday when brand’s mount last-ditch efforts to attract your custom before Christmas.

Beyond that, the Memorial Day mattress sales in May are another key time to buy a mattress in a box for less than normal, with retailers looking to shift older stock before new ranges arrive in the summer. Labor Day mattress sales in September are also a good time to look, as they feature some of the lowest prices before Black Friday season.

What’s the difference between a mattress in a box and a traditional mattress?

When it comes to making the distinction between a mattress in a box and a traditional mattress, it's all about the packing process. A traditional mattress is delivered flat, but a mattress in a box is compressed with a heavy weight, rolled in plastic, boxed, and delivered to your door. When you open the packaging, the mattress unrolls and expands to its previous shape.

This packaging negates the need for an expensive brick-and-mortar store, and the saving is passed on to the consumer. You can get a great quality bed for less, with regular online mattress sales helping you save further.

Claire Davies
Senior Sleep Editor, Certified Sleep Science Coach

Claire is a fully qualified journalist and Certified Sleep Science Coach with over 15 years’ product review experience. Claire is responsible for all mattress and sleep content published on Tom’s Guide, including our Best Mattress of 2025 buying guide. She is our expert on Saatva, DreamCloud, Nectar and Tempur-Pedic mattresses, and is also our in-house hybrid mattress specialist. Claire is certified to advise people on how to choose a mattress that best suits their sleep, body and budget, as well as helping them to create a nighttime routine and bedroom environment that promote good sleep. As Senior Sleep Editor, Claire takes the lead on developing and overseeing rigorous testing procedures for our mattress reviews, both at home and in our fully equipped Sleep Studio. Claire leads a team of experienced sleep and mattress specialists who report on and test a wide range of mattress and sleep products, and she also writes about all things related to sleep, and has interviewed a wealth of experts including mattress designers and buyers, neuroscientists, and doctors of sleep medicine. 

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